Sand-cutter



W. S. FITZGERALD.

SAND CUTTER. APPLICATION HLED JULY l. 1918.

1,330,070. Patented Feb. 10, 1920.

2 SHEETS-SHEET lfnvenibr zlf zzianzgl%gerczzd w. s. FITZGERALD.

SAND CUTTER.

APPLICATION FILED JULY I. 1918.

1,330,070. Patented Feb. 10,1920.

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE. WILLIAM srnrnmv FITZGERALD, or CHICAGO, ILLINOIS, AssIGN on 'ro INTERNA- T ONAL HARvns'rER oo vIPANY, A ooRPoRATIon or New ERsnY.

SAND-CUTTER.

Specification of Letters Patent. Patented FebflO, 1920.

; Application filed July 1, 1918. Serial No. 242,875.

To all whom it may concern:

S. F ITZ- Be it known that'I, WVILLIAM GERALD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sand-Cutters, of which the following is afull, clear, and exact specification.

This invention relates to sand cutting machines for foundry use.

. I In the preparation of sand in foundries for use in molding, it is necessary to work the'sand. and mix it b means of shovels or like implements, whic are used to toss the sand in such a way as to insure a thorough working and mixing thereof, whereby it is left in the desired tempered and homogeneous condition. 7

The object of my invention is to provlde means for working and mixing the sand that will be simple. and strong in construction and efiicient in operation.

Another object is to provide sand mixing means which shall be made up of a minimum number of operative parts and will perform its sand mixing operation in a manner simulating very nearly the hand mixing.-

With the above objects in view my lnvention is embodied in a construction inwhich a plurality of sand mixing elements, such as shovels, are arranged at an angle to the line of draft, and are operated in such a manner that as the machine is propelled across the floor of the foundry, thesand will be thrown at an angle to. the. line of draft, and left in the form of a ridge.

In the construction illustrated in theaccompanying drawings a plurality of sets of sand mixing elements or shovels has been illustrated, these sets being arranged at an angle with relation to each other and to the line of draft, and being operated in such a manner that one set will throw the sand in a direction at an angle to that of the other set, thereby attaining the desired end.

In the accompanying drawings wherein I have illustrated one embodiment of my invention,--'

Figure 1 shows a top plan view of the her 12. 7

provided at their front and rear ends and gitudinall the driving connections from the motor to the crank shaft. 7

The frame of mymachine is substantially rectangular in shape and is made up of horizontally disposed side members 10 and 11 connected at their front ends by a cross mem- The members 10 and 11 are also intermediate their ends with vertically 'extending members 13, 13 and 14, which'in turn are connected, at their upper ends by longitudinally extending members 15 and 16 andv by front and rear members 17 and 18.v Members '15 and 16 are connected intermediate their front and rear ends by cross members 19' and 20, and vertical members 13 and 14 are connected intermediate their upper and lower ends by longitudinally extending members 21 and 22. In addition to the cross members above described, a further cross member 29 is secured to the lonextending side members 21 disposed at t 0 ends of said member 29 and is secured intermediate its ends by a brace 30 to the upper front cross member'17.

The frame work above described is carried by supporting wheels, the front wheels 23 being 'journaled on a shaft 24 which is carried by brackets 25 secured to the longitudinal frame members 10 and 11. The rear wheels 26 are 'mounted on stub shafts 27 which are carried by bracket members 28 Y secured to the rear ends of the longitudinally extending side members 10 and 11. From the above description it will be seen that the frame is substantially box shaped and is of skeleton construction, the frame members being preferably formed of angle 1ron.

The sand mixing elements will now be described.

In the embodiment of the machine illustrated in the drawings, the sand is mixed by means of a series of shove-ls 31 which are manipulated by means of crank arms and crank shafts hereinafter described. The

shovels 31 are provided with shanks 32 which extend through and are secured to blocks 33 rota-tably mounted on the crank arms 34 formed on the crank shafts 35. As illustrated, the shanks 32 are adjustable in the blocks 33 by means of set screws 36 whereby their height may be regulated.

.The crank shafts 35 arejournaled in brackets 37 secured at their outer ends to the lons gitudinally extending members 22 and the inneriends ofthe crank-shafts are journaled in brackets '38 secured to cross braces 39 which are bolted to themembers 19 and 20. The crank shafts as, clearly illustrated in Figs.1 and 3, are arranged at an angle ,to'ea'ch" o the1rand are-connected at theirinthe bevel gear shaft 45.

secured may beof aiiylsuitable construction. Th s jeanthe two outer shovels;

"the shank portions I connected by means of links 51 to brackets By means ner ends by means of intermeshing bevel gears 40 and 41. The left'hand crank shaft .(looking at 3) on which is secured 0, is 'drivenby means of a sprocket wheel 42 which is coiinected'by a chain 453 to a sprocket 1a carried by a stub This stub shaft also carries spur gear 46 which .nieshes with-a gear 17 to ashaft 48 of a motor 49 which motor is bolted to cross braces 50 connected at their ends to the brace '29 'and cross memnzo V Itfsho meansv is shown illustration and d be understood 'tliatthis driving merely for thepurpose of I that any other suitable driving power may be employed.v

In the embodiment of my invention illu stratedfin the drawings, each of the two sets of shovels is shown as madeup of three I 'sho'vels, the middle shovel of each set of p three being mounted on a crank disposed I 30 at an angle of 180 to the crank arms which The's'ho'vels at one side of the machine are also mounted on' crank arms disposed at an angle of with respect'to' the crank arms of the shovels at the opposite side. els in this manner shovels of it will be seen that the the two sets engage the sandalternateIyand that in a single setthe middle shovel is disposed in itshighe'st position when the two rema ning shovels are disposed in their lower position. In each instance 32 of the shovels are 52 carried by' the bar 29. This'construc'tion causes the shovels to -move in a combined vertical and horizontal direction, their "movement describing an orbital path in which the upper portion of the orbit is substantially fiat and the lower portion is oval. of this construction the shovels the sand and move through the pass into sand in a substantially vertical position havf ing an abrupt w thdrawal movement which is followed v, by a long forwardly anddownwardly inclined motion.

By mounting the sand mixing elements or shovels at'an angle to the line of draft, ,I have provided af'construction by the use "of'which the sand will be throwninto a pile,

the opposing sets of shovels forming it into i a ridge.

'Abrief statement of the operation of the finaciliinawill now be'gi'v'en.

The' notor is first set'in" operation by a suitable controlling switchand the machine By mounting the shovv disposed I wardly and inwardly toward the l'ongitudinal center of the/machine.

with the centerof the machine.

The orbital movement given to 1131111 a ridge substan- V the shovels through their link connection 51' with the frame and'their pivotal connection with the cranks, thoroughly mixes and kneads'tl'ie sandy and leaves it in a homogeneous and itriablecondition; a

WVhile I- "have iiil the above. specification described one embodiment whichmy invention may assume,

aiichtliat "modifications may 'be employed without departing from'the spirit and scope of the invention as expressed by the f llowing claims.

Iclaim V 1. A sand cutting machine including frame, crank shafts carried by saidirame and arranged cutting shovels carried by said said shovels downwardly into a, mass "of sand, rearwardly through said sandand to v it should her-understood that the invention is'capable of modification,

at an angle toeacli other,-sandv cran k shafta; and means including said shafts for moving" ward the longitudinal centei'of' the machine,

upwardly away from said' saiid, and 'forwardly, whereby the sand {will be deposited in a central ridge.

2. Asand cutting machine includinga irame and a plurality of sand cuttingelements independently carried by said frame and disposed at an angle to the lineof draft,

"and means for giving'said elements-abombmed vertical and horizontal j movement,

said horizontal movement being directe'd td ward the longitudinal center'of then a'chine.

'3. A :sand cutting machine including a frame and a plurality of sand cutting-tiles mentsearried by said framean'd disposed at an angle to the line of draft, and :me'ans-ineluding a series of crank arms for giving I said elements a combined downward and in ward movement toward the longitudinal: 'cens tor of the machine.

1. A sand cutting machine includin'g,-in combination, a frame and a plurality'of sand cutting elements, a crank shaftj ournaled' on said frame'and having oppositely disposed crank arms said sand cuttingelementsbeing operatively carried by said'oppositely crank arms and "movingiidown- 5. A sand cutting machineiiinbluding;in

"combination, a plurality of sets of angularly. disposed sand cuttingel'ements,; :and

' ineans for-giving saidlelements a co'x'nbined 130 vertical and horizontal movement in a direction to deposit the sand in a central ridge.

6. A sand cutting machine including, in combination, a plurality of sets of oppos tely disposed, angularly arranged sand cutting elements, and means for giving said elements a combined vertical and horizontal movement toward the center of the machine, certain of the elements of one set being disposed in their lower position while certain of the elements of the opposite set are disposed in their elevated position. 7. A sand cutting machine including, in combination, a plurality of oppositely disposed angularly arranged sets of sand cut ting elements, means including a series of crank arms for giving said elements an orbital movement in a direction to deposit the sand in a central ridge.

8. A sand cutting machine including, in combination, a frame, a plurality of crank shafts carried by said frame and disposed at s an angle with respect to each other, crank arms carried by said crank shafts, the crank arms on one of said shafts being disposed at an angle with respect to the crank arms on the shaft arranged at an angle with respect thereto, sand cutting elements operatively carried by said crank arms, and means inandmeans including said shafts for giving said shovels an abrupt downward movement into a mass of sand, and a gradual rearward and upward movement whereby said shovels will deposit the sand in a central ridge.

In testimony whereof I aflix my signature.

WILLIAM STEPHEN FITZGERALD. 

